XVS 650 rear hub noise

Hi. New to the forum, was kinda hoping this wouldn't be my first kind of post but needs must.

Just bought an XVS 650 with 66k miles on the clock.

Been riding it lately and noticed a clunking noise from the rear hub.

Mainly hear it when coasting as the pipes are too loud to hear anything when driving.

Anyone had similar with these bikes and should I be worried?

I'm thinking it could possibly be bearings or drive shaft splines?

Any advice would be appreciated.

Cheers,

Auzz